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Descripción
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| Multiple tuned mass dampers have been widely used to mitigate walking pedestrian-induced vibrations on footbridges when multiple vibration modes were excited jointly. Both their mechanical parameters and their allocation must be determined to guarantee the compliance of the comfort requirements of the footbridge. Herein, two design criteria were described and compared. Both criteria were based on the motionbased design method. Thus, they were formulated as a constrained minimization problem, sharing the same objective function, defined as the sum of the masses of the different devices, and the same constraints, defined in terms of the comfort requirements of the structure, but considering, however, different design variables. Thus, in the first criterion, the devices were allocated at the peak of the affected vibration modes and their mechanical parameters were considered as design variables, while in the second criterion, both the mechanical parameters of the devices and their allocation were taken into account as design variables, reducing by counterpart the number of passive damping devices. As global optimization method, a nature-inspired optimization algorithm was taken into account. The performance of both criteria was assessed via their implementation in a lively steel footbridge. The results of this study show that although both criteria allow solving the problem, however, the second criterion reduces the mass of the damping system which is advantageous for both the damping devices and the structure. | |
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Internacional
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Si |
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Nombre congreso
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Congresso de Métodos Numéricos em Engenharia |
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Tipo de participación
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960 |
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Lugar del congreso
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Guimaraes |
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Revisores
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Si |
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ISBN o ISSN
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978-989-54496-0-6 |
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DOI
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Fecha inicio congreso
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01/07/2019 |
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Fecha fin congreso
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03/07/2019 |
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Desde la página
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1 |
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Hasta la página
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9 |
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Título de las actas
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Ponencias del Congresso de Métodos Numéricos em Engenharia |